Machine for crushing ores, &amp;c.



No. 653.679. Y Patented July I7, |900.`

s. w. KIMBLE.

MACHINE FOR CRUSHING DRES, &.c.

(Application filed Feb, 21, 1899.) (N0 MOIiBL)` 2 Sheets-Sheet I.

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nu. 653,679. Patemeduuuy I7, |900. s. w. KIMBLE.

MACHiNE FOB CRUSHING DRES, GLC.

(Application led Fab. 21, 1899.)

2 Sheets-Sheet 2,

(No Model.)

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PATENT SMITH W. KIMBLE, OF NEW YORILN. Y.

MACHINE FOR CRUSHING oREs, eac.

SPECIFICATION forming part of Letters Patent No. 6553,679, date July 1v,1906.

Application filed February 21,y 1899. Serial No. 706,397. (No model.)

To @ZL w/wm t 1i/tay concern:

Be it known that I, SMITH W. KIMBLE, a resident of New York city, Stateof N ew York, have invented a new and useful Improvement in Machines forCrushing Ores and the Like, which invention is fully set forth in thefollowing specification.

Thisinvention relates to machinesfor crushing ore and for similar uses;and its object, briefly stated, is to produce the maximum effect with aminimum of Wear. By the mill herein described and in which the inventionis carried out it has been found practicable to crush hard quartz tosuch iiueness that it will pass through a screen of two hundred mesh.The crushing force is under perfect control and can be regulated at willto produce any desired degree of fineness.

' At the present time most of the work of orecrushing is effected in thecommon stampmills, and though many attempts'have been made to supplantthese clumsy machines they have met with indifferent success. Severaltypes of ore-crushers employing rolls have been brought forward and usedto some extent; but the tendency in use is to Wear corrugations in thesurface of the rolls, so that the product becomes lacking in uniformity.Owing to the character of the work done, and the tremendous forceexpended upon small areas, it has been found extremely diiiicult todesign and construct machinery that will maintain its initial efciencyfor any considerable period of time or which does not require frequentand expensive repairs.

According to the present invention the ore or other material to bepulverized is ground between a stationary surface or die, which is, infact,an inverted mortar,and a movable surface or muller, the latterbeing beneath the former, so that the apparatus maybe appropriatelytermed an inverted-muller mill. The die or mortar is annular in shape,the central opening serving to admit the material, which latterimmediately spreads out after passing the opening into a relativelythinlayer between the muller and mortar, so that the crushing force isexerted under the most favorable conditions. The opposing surfaces ofthe inverted mortar and the muller gradually converge, approachingclosest at the extreme outer circumference of the former, which isseveral times the circumference of the admission-opening. This disrh`position of the partsproduces another important result-namely, uniformand free feed by gravity. The muller is mounted on an upright shaft, towhich a movement of nutation is imparted by means of an eccentric. Themuller is supported by a rod or equivalent means, to which any desireddegree of tension can be imparted by appropriate regulating devices,which can be of anyrsuitable construction. The muller can thus bebrought to bear against the lnortar with any desired degree of pressure.It is observed that in the operation of the machine the muller beingturned by the eccentricin one direction rotates slowly on its own axisin the opposite direction, the rate of this incidental reverse movement.being about one-sixth that of the positive movement derived from thedriving-shaft. This movement is of great utility in that it constantlychanges the wearing-surfaces, preventing excessive Wear on particularparts.

Other features of improvement Will be expla-ined in connection with theaccompanying drawings, in Which- Figure 1 is a vertical sectional Viewof a large-size machine mounted on a foundation of brick or the like.Fig. 2 is a perspective View of a smaller portable machine. Fig. 3 is aperspective view of the casting Which is secured under the base-plateand in which the driving-shaft has its bearings; and Fig. 4L is a topplan view of the base-plate, showing part of the casting projecting intothe opening therein.

Referring to the drawings, A represents the base-plate of the machine,which, as shown in Fig. l, is mounted on a suitable foundation of brickor stone, this being the mounting preferred for large-sized machines andfor a series of machines arranged in a row.

In Fig. 2 I have shown the base-platesupported on legs, this being themounting preferred for smaller machines intended to be readily portable.In other respects the mills of Figs. l and 2 are the same. y

Through the middle of base-plate Aris a four-armed opening a. the plateis secured by bolts b b a one-piece casting B. (See Figs. l and 3.)Casting B IOO To the under side of consists of a top plate o, having ateach end a depending arm d, said arms being connected at their lowerextremities by a bridgepiece e. In one side of the bridge-piece, midwayof its length and between lugs g g, projecting therefrom, is asemicircular bearingf. On the plate o and about a central crossshapedopening c therethrough are upwardly and downwardly projecting flanges hand t', respectively. When casting B is secured in place, the llange hthereon fits closely in the central part of the opening a, as clearlyshown in Fig. 4, leaving the ends of the arms of said openingunoccupied, except by the headed ends ofset-bolts k, which pass throughscrew-threaded openings in the flange h, and are thus renderedaccessible for adjustment. Corresponding bolts ZZ pass through the sidesof the lower flange 'L'. At their inner ends the bolts k and Z bearagainst bearing-ltlocks'm, four in number and each having a concavebearing-face, one of said blocks being located in each of the four armsof the cross-shaped opening c (through plate c) and within the flanges hand t'. By turning the bolts blocks 'm may be adjusted to take up wear.

N is a vertical shaft hearing at its upper end between the concave facesof blocks m and at its lower end in the semicircular recessf inbridge-piece e and a similar recess formed in a block f, secured tobridge-piece e, between the lugs g g thereon, as shown in Fig. 1. On theshaft between its bearings. is a driving-pulley N', through which theshaft may be rotated from any suitable source of power.

At its upper extremity shaft N carries head N2, having anupwardly-opening circular recess otherein, located eccentrically to theaxis of the driving-shaft and in which is the bearing for the lower endof the muller-shaft Q. Said bearing consists of three parts-an ou terring p, fitting closely within opening 0, aball 10', having a centralperforation therethrough in which the lower end of the millier-shaft Qloosely engages, and an intermediate bushing p2 between the ring 19 andthe ball p, the inner face of bushing p2 being of such curvature as toclosely fit the surface of the ball, while permitting the same to turnfreely therein, all as clearly shown in Fig. l. The bushing p2 may ofcourse be cast about the ball in any suitable manner.

Above the base-plate A is a casing R, di-

vided interiorly into two compartments by an' inclined partition r,formed at its lower end with a discharge spout fr', which passes throughan opening-fr2 in base-plate A. (See Fig. 4.) Casing R is open at oneside to give access to the lower compartment, in which are located thehead N and other parts associated therewith.

Over the upper open end of the casing is mounted a cap S, having acentral opening therethrough, while on its upper surface are threeupwardly-extending converging arms s, supporting a tube s. T istheannulanshaped essere 7', made suilciently large to allow for themovement of the shaft. To prevent thepulverized ore from passing throughthis opening and down into the bearing for the lower end of the shaft,where it would do much damage, said opening is surrounded by a curvedplate q', upon which rests a ring q? A similar ring q2 rests against ashoulder on the millier-shaft, and between these rings-and about theshaft is a coiled spring if, which exerts its tension to hold ring q2tightly against the plate q to prevent pulverized ore or dust frompassing between the meeting surface thereof and through opening q, at.the same time permit-ting vertical movement of thev muller-shaft withoutaffecting the connection. A hood t', of canvas or other fabric,connected between the edges of rings q' and q2, serves to completelyinclose the springt.

On the in uller-shaft Q and resting against the ring q2 is a disk U.Muller V, practically ot mushroom shape, rests agaiustdisk U andissecured thereto by bolts u, preferably cast into the mullet', as shownin Fig. l, and passing through perforations in the disk U. It will beobserved that the muller is located ou the upper portion of its shaftnear the fulcrurn, while the radius of the base 0f the muller is longerthan the distance fromv the center of the base to the fulcrum of .theshaft. The upper acting face of the muller has a downward inclination ofabout thirty degrees. The acting face of the die or inverted mortar hasa slightly-greater inclination, so that the two surfaces graduallyconverge toward their peripheral edges, at which point they most nearlyapproach. In other words, the space inclosed between the acting faces ofthe mortar and its muller diminishes in thickness from the centeroutward. Owing to the comparatively-slight slope or inclina.- tion ofthe face of the muiler the material under treatment does not fallthrough until it has been uniformly crushed to the desired extent.

At its upper extremity shaft Q has an eye w, and beneath said eye is aball w', bearing loosely in a bearing-ring to2, free to slide in tubes'. On the upper end of tube s are mounted piece washer w', rubber block002,v Washer ma, and ak hand-wheel y, in the order named. Bearing-ballsy are interposed between the piece a; and washer, and. hand-V wheel yengages the screw-threaded end of a,

rod z, connected at its lower end to eye w ofv shaft Q by a link z' andprojecting upwardly IOO IOS

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'through tube s', piece rt, washer block fr?, and washer x3. Thus byturning the wheel 'y the acting faces of the mortar and muller may bemoved toward or from each other to regulate the fineness to which it isdesired to crush the ore or other material. In case noncrushable piecesof material are fed between the crushing-surfaces the extreme downwardpull on rod e' will compress the block x2 and allow the substance topass between the surfaces without breaking the machine.

In the operation of the machine the material to be crushed is fed intothe hopper S and passes down onto the upper face of muller V. At thesame time by the rot-ation of shaft Q a movement of nutation is impartedto the muller V, causing it to approach the mortar T at a point whichconstantly changes, while receding therefrom over the remainder of itssurface. The crushed ore is delivered into the upper compartment ofcasing R in a continuous stream from the periphery of the muller V,while fresh material is constantly descending by gravity through thecentral opening in the mortaiinto 'the space between thecrushing-surfaces. While the muller V and shaft Q are being turned inone direction by the eccentric connection with the driving shaft, theyare caused to slowly rotate on their'axis in an opposite direct-ion,such rotation being transmitted to the hand-wheel y, which, togetherwith the washers or and 503 and block m2, turn on balls y. This producesa true rolling movement which has been observed in the practicaloperation of the machine and serves to constantly change the relativepositions of the muller and its mortar, whereby excessive wear atparticular points is avoided. This rolling movement also preventsscraping or grinding action between the muller and its mortar, which isentirely distinct from the crushing accomplished by my machine. Thefineness to which the ore is crushed may be regulated by turninghand-wheel y to raise or lower rod e, thus raising or lowering themuller V.

The material to be crushed is in comparatively-large lumps when it firstfalls through the central opening into the space between the mortar anditsl muller. Atthis place the greatest crushing force is required, andit is here that my construction provides the great-v est leverage. Asthe material is broken into smaller lumps it passes by gravity outwardoveramore extended surface. v Consequently it is spread out into alayer, becoming thinner and thinner, so that it is more easily operatedon. As the partly crushed material thus spreads out less crushing forceis required, and here my construction providesa gradually-lesseningleverage. Thus the maximum results are obtained with the minimum offorce and wear.

Having now fully described my said invention, what I claim isl. In acrushing-machine, a muller, a shaft for the muller, a mortar cooperatingwith the muller, a yielding support for the shaft, and means foractuating the shaft to impart a movement of nutation to the muller.

2. In a crushing-machine, a muller, a shaft for the muller, an invertedmortar overhanging and cooperating with the muller, a yielding supportfor the shaft, and means for actuating the shaft to impart a movement ofnutation to the muller.

3. In a crushing-machine, a muller, ashaft for the muller fulcrumed atits upper end so as to be capable of movement in a longitudinaldirection, but fixed against movement in a lateral direction, aninverted mortar overhanging and cooperating with the muller, a yieldingsupport for the shaft, and means for actuating the lower end of theshaft to impart a movement of nutation to the muller.

4. In a crushingmachine, a muller the crushing-face of which is ofcomparativelyslight convexity, an overhanging inverted mortar whosecrushing-face is of somewhatgreater eoncavity, the intermediate spacebetween said crushingfaces diminishing in width as it recedes from thecenter, a mullershaft yieldingly supported from above and fulcru med atits upper end, and means at the lower end of said shaft for imparting amovement of nutation thereto.

5. In a crushing machine, an inverted muller whose acting face isapproximately that of a cone of low pitch, an inverted mortarover-hanging and cooperating with the muller, the crushing-face of themortar being also of low pitch, a shaft for the muller, a yieldingsupport for the shaft, and means for actuating the shaft to impart amovement of nutatiou to the muller.

6. In a crushing machine, an inverted IOO muller whose acting Aface isapproximately that of a cone of low pitch, an inverted mortaroverhanging and cooperating with the muller, the crushing-face of themortar being of greater pitch than that of the muller, a shaft for themuller, a yielding support for the shaft, and means for actuating theshaft to impart a movement of nutation to the muller.

7. The combination with an inverted muller whose acting face isapproximately that of a cone of low pitch, and an overhanging invertedmortar whose acting face is of a somewhat-greater angle, of amuller-shaft yieldingly supported from above, and a shaft having a headwith a seat eccentrically located thereon for actuating saidmuller-shaft.

8. In a crushing-machine, the combination of a muller-shaft having ayielding support and a positive fulcrum at its upper end, an invertedmuller thereon whose acting face slopes at an angle of about thirtydegrees, an overhanging inverted mortar whose acting face is at aslightly-greater angle than that of the muller, and means for impartinga movement of mutation to said shaft, substantially as described. h

9. In a crushing-machine, the hub rising from the hopper, the yieldingsu pport carried thereby, the mller-shaft upheld by said support andhaving a positive fulerum at its u pper end, and the inverted mnllerfast on the upper portion of said shaft, in combination with anoverhanging inverted mortar, and

means for imparting a movement of mutation lo to said shaft,substantially as described.

In testimony whereof I have signed this speeieation in the presence oftwo subscribing witnesses.

SMITH W. KIMBLE. Witnesses:

ELISHA K. CAMP, C. A. L. MAssm

